Plasma corticotropin-releasing hormone, β-endorphin and cortisol inter-relationships during human pregnancy

1993 ◽  
Vol 128 (4) ◽  
pp. 339-344 ◽  
Author(s):  
Eng-Cheng Chan ◽  
Roger Smith ◽  
Terry Lewin ◽  
Max W Brinsmead ◽  
Hong-Ping Zhang ◽  
...  
Keyword(s):  
Cord Blood ◽  
Maternal Plasma ◽  
Corticotropin Releasing Hormone ◽  
Third Trimester ◽  
Blood Samples ◽  
Releasing Hormone ◽  
Human Pregnancy ◽  
The Third ◽  
Dynamic Relationships

To investigate the dynamic relationships among corticotropin-releasing hormone (CRH), β-endorphin (βEP), cortisol and obstetric events during pregnancy, blood samples were collected from 193 women at 28 weeks, 38 weeks, during labour and on the second postnatal day. Cord blood at delivery was also obtained. We found that: (1) Maternal plasma CRH, βEP and cortisol rose from 28 to 38 weeks. (2) During the third trimester maternal plasma CRH and βEP were correlated (r=0.30, p<0.001). (3) During labour, no correlations were found among maternal plasma CRH, βEP and cortisol. (4) Maternal CRH at labour and the duration of labour were not correlated. (5) Maternal plasma CRH tended to be higher in women who delivered early (more than seven days prior to estimated date of confinement [EDC]) relative to those who were on time (within seven days' EDC) or late (greater than seven days after EDC). (6) CRH in maternal plasma at labour and cord blood were correlated (r = 0.29, p<0.05) as were maternal and fetal βEP (r=0.43, p<0.001). (7) Fetal obstetric difficulty was correlated with fetal βEP (r=0.54, p<0.001). Our findings support the hypothesis that maternal plasma CRH regulates maternal βEP during the third trimester, but other factors are involved during labour and in response to maternal obstetric stress.

scholarly journals Natalizumab concentrations during pregnancy in three patients with multiple sclerosis

2021 ◽  
pp. 135245852110521
Author(s):  
Alyssa A Toorop ◽  
Theo Rispens ◽  
Eva MM Strijbis ◽  
Bob W van Oosten ◽  
Brigit A de Jong ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Disease Activity ◽  
Third Trimester ◽  
Blood Samples ◽  
The Third ◽  
Trough Concentrations ◽  
Active Multiple Sclerosis

In women with very active multiple sclerosis (MS), natalizumab can be continued during pregnancy to prevent rebound disease activity. Our aim was to evaluate changes in serum natalizumab trough concentrations during pregnancy. Blood samples of 3 patients were collected before, during, and after pregnancy. Natalizumab trough concentrations gradually decreased during pregnancy. The patient with the lowest trough concentrations during the third trimester was treated with extended interval dosing (EID). After delivery, natalizumab concentrations increased to similar levels as before pregnancy. All patients remained clinically and radiologically stable. MS neurologists should be aware of decreasing natalizumab concentrations during pregnancy, especially in patients with low initial trough concentrations and patients with EID.

scholarly journals ESSENTIAL FATTY ACIDS (EFA) IN CORD BLOOD OF THIRD TRIMESTER INFANTS AND MATERNAL PLASMA

1977 ◽  
Vol 11 (4) ◽  
pp. 513-513
Author(s):  
Zvi Friedman ◽  
Edward L Lamberth ◽  
Abraham Danon ◽  
William J Mann ◽  
Nicholas M Nelson
Keyword(s):  
Fatty Acids ◽  
Cord Blood ◽  
Essential Fatty Acids ◽  
Maternal Plasma ◽  
Third Trimester

scholarly journals Determinants and Measurement of Neonatal Vitamin D: Overestimation of 25(OH)D in Cord Blood Using CLIA Assay Technology

2019 ◽  
Vol 105 (4) ◽  
pp. e1085-e1092
Author(s):  
Mengdi Lu ◽  
Bruce W Hollis ◽  
Vincent J Carey ◽  
Nancy Laranjo ◽  
Ravinder J Singh ◽  
...  
Keyword(s):  
Vitamin D ◽  
Cord Blood ◽  
Late Pregnancy ◽  
First Trimester ◽  
Controlled Study ◽  
Positive Bias ◽  
Third Trimester ◽  
Serum Samples ◽  
Human Cord Blood ◽  
Blood Samples

Abstract Context Vitamin D (VD) deficiency in pregnancy and the neonatal period has impacts on childhood outcomes. Maternal VD sufficiency is crucial for sufficiency in the neonate, though the effect of early versus late pregnancy 25-hydroxy-vitamin D (25(OH)D) levels on neonatal levels is unknown. Furthermore, chemiluminescence immunoassays (CLIAs) are widely used, though their validity in measuring 25(OH)D specifically in cord blood specimens has not been established. Objective To assess the validity of a CLIA in the measurement of cord blood 25(OH)D and to evaluate maternal determinants of neonatal 25(OH)D, including early versus late pregnancy 25(OH)D levels. Design This is an ancillary analysis from the Vitamin D Antenatal Asthma Reduction Trial (VDAART), a randomized, double-blinded, placebo-controlled study. Participants and Intervention A total of 881 pregnant women at high risk of having offspring asthma were randomized to receive VD supplementation or placebo. Serum samples were collected from mothers in early and late pregnancy and from offspring cord blood at birth. 25(OH)D levels were assayed by CLIA in all maternal and offspring samples and by LC-MS/MS in all offspring samples and a subset of 200 maternal third trimester samples. Results Cord blood 25(OH)D levels were higher as measured by CLIA (mean 37.13 ng/mL [SD 18.30]) than by LC-MS/MS (mean 23.54 ng/mL [SD 11.99]), with a mean positive bias of 13.54 ng/mL (SD 12.92) by Bland-Altman analysis. This positive bias in measurement by CLIA was not observed in maternal samples. Third trimester 25(OH)D was a positive determinant of neonatal 25(OH)D levels. Conclusion Chemiluminescence immunoassays overestimate 25(OH)D levels in human cord blood samples, an effect not observed in maternal blood samples. The quantification of 25(OH)D by CLIA should therefore not be considered valid when assayed in cord blood samples. Third trimester, but not first trimester, maternal 25(OH)D is one of several determinants of neonatal 25(OH)D status.

Maternal plasma corticotropin-releasing hormone associated with stress at 20 weeks’ gestation in pregnancies ending in preterm delivery

1999 ◽  
Vol 180 (1) ◽  
pp. S257-S263 ◽  
Author(s):  
Calvin J. Hobel ◽  
Christine Dunkel-Schetter ◽  
Scott C. Roesch ◽  
Lony C. Castro ◽  
Chander P. Arora
Keyword(s):  
Preterm Delivery ◽  
Maternal Plasma ◽  
Corticotropin Releasing Hormone ◽  
Releasing Hormone

Alterations of serum resistin in normal pregnancy and pre-eclampsia

2004 ◽  
Vol 108 (1) ◽  
pp. 81-84 ◽  
Author(s):  
Danqing CHEN ◽  
Minyue DONG ◽  
Qin FANG ◽  
Jing HE ◽  
Zhengping WANG ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Normal Pregnancy ◽  
Third Trimester ◽  
Resistin Level ◽  
Blood Samples ◽  
The Third ◽  
Maternal Adaptation ◽  
Serum Resistin Level ◽  
One Way Anova ◽  
Insight Into

Resistin is expressed in human placenta and has been postulated to play a role in regulating energy metabolism in pregnancy. However, changes in serum resistin levels in normal pregnancy and in the setting of pre-eclampsia are far from understood. The purpose of the present study was to clarify the alterations in serum resistin level in normal pregnancy and pre-eclampsia. Blood samples were taken from 28 healthy non-pregnant women, 27 women in the first, 26 in the second and 26 in the third trimesters of normal pregnancy and 25 women with pre-eclampsia. Serum resistin concentrations were determined by using an ELISA, and mean serum resistin levels were compared with one-way ANOVA. Serum resistin levels were not significantly different among non-pregnant women and women in the first and second trimesters of pregnancy (P>0.05 for all). Serum resistin was significantly elevated in the third trimester of normal pregnancy compared with non-pregnant women (P<0.01) and women in the first (P<0.001) and second (P<0.001) trimesters of pregnancy. Serum resistin level was significantly lower in women with pre-eclampsia than women in the third trimester of normal pregnancy (P<0.001), but was comparable with those of non-pregnant women and women in the first and second trimesters of pregnancy (P>0.05 for all). In conclusion, we found an increase in serum resistin in the third trimester of normal pregnancy, but this increase was not present in pre-eclampsia. We postulate that these associations may offer insight into the mechanisms of maternal adaptation to pregnancy and the pathogenesis of pre-eclampsia.

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